Priming-cup



` rename-CUP. n

readies.

Application filed September 19, 1919. Serial No. 324,837.

T 0 all whom t may concern:

Beit known that I, CHARLES H. KNoBs, a citizen of the United States, residing at Philadelphia, in the county ot Philadelphia and State of Pennsylvania, have invented new and usefulr Improvements in Priming- Cups, of which the following is la specification.

An object of the invention is to provide a cup particularly adapted i'or internal combustion motors, for priming the cylinders thereof with a fuel or for injecting into the cylinders, scavenging fluids or the like for the removal oi" carbon deposits :trom the interior of the cylinders, whereby the men tioned operations can be carried out while the motor is in operation or in non-operating position.

Among other features the invention comprehends various improvements over the usual forms ct priming cups now generally used on motors such as internal combustion engines, and inwhich, in the prevalent pres ent forms of devices, the priming of the cylinders without danger of a back-flare, can only be accomplished when the motor is not running. With my device the cylinders can be primed or scavenging fluid injected into the cylinders whether the motor is running or not, it being desirable, however, particularly in cases where the motor is to be scavenged, that the scavenging buid be injected into the cylinders, while the motor is in operation. To accomplish this result I provide a chamber, forming a part of the cup and which has an'inlet andan outlet separately controlled as to the opening and closing thereof so that while the motor is running and the outlet of the chamber closed, the fluid to be' injected into the cylinders can be received through the open inlet into the chamber and the inlet then closed and the outlet subsequently opened. permitting the fluid to pass on into the cylinder and be carried away with the succeeding explosions of the gases therein without danger of the enn plosions or back-Hare passing through the chamber Vand injuring the operator who is or has injected the fluid.

In the further disclosure ot the' invention, reference is to be had to the accompanying drawings constituting a part of this specilication, in which similar characters of reference denote corresponding parts in all the views, and in which,

Figure 1 is a fragmentary side elevation Specification of Letters Patent.Y

Patented Sept. 1921.

showing` my device applied to the cylinder of an internal combustion engine, parts being brokenaway to disclose the underlying structure, with the outlet of the chamber shown in closec' positionand the inlet in open, position. Y

Fig. 2- is a vertical sectional view taken through the deviceshowing the outlet open andthe inlet closed. j

Fig. 3- is a plan view of the structure as shown in, Fig. 1. j

Fig. 4 is a horizontal sectional view taken substantially on the line 4-4t in Fig. 2, and 7 Fig. 5- is a fragmentary side elevation showing the means tor limiting the opening and closing movement of the cap.

Referringmore particularly to the views, the cylinder of an internal combustion engine is indicated by the numeral 10 and my form ot cup, indicated by thenumeral 11, is applied to the top or head 12 of the cylinder. The cup 11 comprises a casing 13 formed to .provide an inner chamber 14 having an 0ut let 15 communicating by a longitudinal bore onpassage 16 with the cylinder 10, said bore being formed in a stem 17 integral with the casing 18 and threaded into the head 1'2 oi the cylinder Vas shown. The outlet `15 is formed to provide a valve Vseat 18 for the lower end of a needle valve `19, the stem 2O of which has threaded engagement with the casing at 2 1 and provided with `an external handle 22 whereby rotation of the valve in one direction will raise it from the valve Vseat 18 and rotation in the Vother direction will the rotation of the cap on the casing can be brought into or out of registration with an inlet passage 28 of the casing, affording communication with the chamber 111. Simi-` larly the cap 26 has an airpassage 29 which will be brought into registration withan air passage 30 in the casing 13 when the passages 27, 28 are in registration so that when a fluid dle 31 for rotating the cap on the casing" and when the cap is'screwed down, it will be seen that'the'cap will compress the packing 24 around the stem 2O of the needle valve so as to prevent any leakage at this point.' A gasket 32 is arrangedbetween the casing and cap and is of course provided with openings 33, 34, which register with the openings 28, 30, ,the casing having a circular stepped down portion providing a ledge over which fits an annular extension 37 of the cap, thus further preventing leakage and also Afacilitating the properseating of the cap relative to the casing the operation ofy the device.

In the use of the device described I will assume that the needle valve is in closed position; that the motor is in operation and that it is desired to scavenge the cylinder with a suitable carbon removing flu-id, such as kerosene or the like. Operation of the handle 31 will rotate the cap V26 upon the casing bringing the passages 27, 29, into registration with the passages 28, 30'and the fluid is now poured in through the passagesA 27 28 to flow into the chamber 1a While the air in the chamber displaced by the incoming fluid will passent throughthe passages 29, 30. The handle 31 is now actuated to rotate the cap to move the registering openings 27 29, out of registration with'the passages 28, 30, thus sealing the fluid in the chamber 1s and when this has been accomplished the Vlever or handle 22 is actuated to unseat the needle valve 19- so that the suction created in the cylinder will draw or suck the fluid contained in the chamber, downwardly through the bore 16 into the cylinder where the `said fluid will of VVcourse-be operated upon and exploded or taken up to perform its function. Of course it will be understood that the device can be employed in the usual manner as the ordinary priming Vcup when the motor is not running, but it will be apparent that with my form of device the scavenging operation taking place while the motor is running and which is the most desirable time for the accomplishment thereof, prevents the flame from the explosion, from shooting out through Tthe bore 16 and chamber 14C into ythe face of the operator for the reason that the cap is moved into closed position before the needle valve is unseated. It may be that incertain cases it is desired to scavenge the cylinder by allowing the explosion to pass out through the priming cup a-nd in an instance of this character, the cap is moved into open position so that the openings 27, 28 and 29, 30, register with the needle valve, unseatedto provide a free passage from the cylinder. to the exterior.

In order to prevent accidental unthreadl ingof the cap 26 I preferably have the side wall 37 of the cap formed with a cut out portion, a screw 89 being threaded into the side of the casing 13 on the exterior to lie inthe path of the cut out portion and which cutout portion provides stop flanges 40 whereby in rotating the cap the same will only have a limited movement in one direction or the other, which limited movement however is sufficient for the rotation of the cap to bring the passages 27 28, and 29, 30, into or out of registration, as desired. Y Having described my invention, I claimpriming cup comprising a casing formed at its bottom .with a reduced extension threaded forengagement within a threaded hole in the cylinder head of an engine, said extensionrbeing formed with a bore lead- ,ing into a valve seat at its juncture with the casing, a threaded extension at the top of the casing having a central threaded opening, and an inlet port and a small passage formed in said last named extension near the side thereof, a cap upon said upper extension and having a handle whereby it ture.

CHARLES H. KNoBBs.

In testimony whereof I affix my signa- 

